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45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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namespace DB
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{
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/// Part of the ALTER UPDATE statement of the form: column = expr
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class ASTAssignment : public IAST
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{
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public:
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String column_name;
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ASTPtr expression;
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String getID(char delim) const override { return "Assignment" + (delim + column_name); }
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ASTPtr clone() const override
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{
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auto res = std::make_shared<ASTAssignment>(*this);
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res->children.clear();
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if (expression)
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{
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res->expression = expression->clone();
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res->children.push_back(res->expression);
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}
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return res;
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}
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protected:
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void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
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{
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settings.ostr << (settings.hilite ? hilite_identifier : "");
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settings.writeIdentifier(column_name);
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settings.ostr << (settings.hilite ? hilite_none : "");
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settings.ostr << (settings.hilite ? hilite_operator : "") << " = " << (settings.hilite ? hilite_none : "");
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expression->formatImpl(settings, state, frame);
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}
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};
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}
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